| Summary: | The paths of many migrants include multiple destinations and transit routes, yet this pattern is almost never reflected in empirical analyses. For example, 9 percent of recent immigrants to the United States arrived from a transit country as opposed to the country where they were born. Among those arriving from many high-income countries, the transit migration ratio exceeds 30 percent. To explain these patterns, this paper constructs a dynamic model of global migration that allows transit migration opportunities to impact the attractiveness of locations. After estimating the structural parameters of the model, the paper simulates various counterfactual scenarios to highlight the spillovers of transit migration paths
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